Dr. Laurence

Boris Karloff

Acting

Dr. Clare Wyatt

Anna Lee

Acting

Dick Haslewood

John Loder

Acting

Lord Haslewood

Frank Cellier

Acting

Clayton

Donald Calthrop

Acting

Dr. Gratton

Cecil Parker

Acting

Prof. Holloway

Lyn Harding

Acting

Journalist

Clive Morton

Acting

Landlord

D.J. Williams

Acting